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sfc: Prepare for RX scatter on EF10
[deliverable/linux.git] / drivers / net / ethernet / sfc / mcdi_port.c
1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2009-2010 Solarflare Communications Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation, incorporated herein by reference.
8 */
9
10 /*
11 * Driver for PHY related operations via MCDI.
12 */
13
14 #include <linux/slab.h>
15 #include "efx.h"
16 #include "phy.h"
17 #include "mcdi.h"
18 #include "mcdi_pcol.h"
19 #include "nic.h"
20 #include "selftest.h"
21
22 struct efx_mcdi_phy_data {
23 u32 flags;
24 u32 type;
25 u32 supported_cap;
26 u32 channel;
27 u32 port;
28 u32 stats_mask;
29 u8 name[20];
30 u32 media;
31 u32 mmd_mask;
32 u8 revision[20];
33 u32 forced_cap;
34 };
35
36 static int
37 efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg)
38 {
39 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_CFG_OUT_LEN);
40 size_t outlen;
41 int rc;
42
43 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_IN_LEN != 0);
44 BUILD_BUG_ON(MC_CMD_GET_PHY_CFG_OUT_NAME_LEN != sizeof(cfg->name));
45
46 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_CFG, NULL, 0,
47 outbuf, sizeof(outbuf), &outlen);
48 if (rc)
49 goto fail;
50
51 if (outlen < MC_CMD_GET_PHY_CFG_OUT_LEN) {
52 rc = -EIO;
53 goto fail;
54 }
55
56 cfg->flags = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_FLAGS);
57 cfg->type = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_TYPE);
58 cfg->supported_cap =
59 MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_SUPPORTED_CAP);
60 cfg->channel = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_CHANNEL);
61 cfg->port = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_PRT);
62 cfg->stats_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_STATS_MASK);
63 memcpy(cfg->name, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_NAME),
64 sizeof(cfg->name));
65 cfg->media = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MEDIA_TYPE);
66 cfg->mmd_mask = MCDI_DWORD(outbuf, GET_PHY_CFG_OUT_MMD_MASK);
67 memcpy(cfg->revision, MCDI_PTR(outbuf, GET_PHY_CFG_OUT_REVISION),
68 sizeof(cfg->revision));
69
70 return 0;
71
72 fail:
73 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
74 return rc;
75 }
76
77 static int efx_mcdi_set_link(struct efx_nic *efx, u32 capabilities,
78 u32 flags, u32 loopback_mode,
79 u32 loopback_speed)
80 {
81 MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_LINK_IN_LEN);
82 int rc;
83
84 BUILD_BUG_ON(MC_CMD_SET_LINK_OUT_LEN != 0);
85
86 MCDI_SET_DWORD(inbuf, SET_LINK_IN_CAP, capabilities);
87 MCDI_SET_DWORD(inbuf, SET_LINK_IN_FLAGS, flags);
88 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_MODE, loopback_mode);
89 MCDI_SET_DWORD(inbuf, SET_LINK_IN_LOOPBACK_SPEED, loopback_speed);
90
91 rc = efx_mcdi_rpc(efx, MC_CMD_SET_LINK, inbuf, sizeof(inbuf),
92 NULL, 0, NULL);
93 if (rc)
94 goto fail;
95
96 return 0;
97
98 fail:
99 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
100 return rc;
101 }
102
103 static int efx_mcdi_loopback_modes(struct efx_nic *efx, u64 *loopback_modes)
104 {
105 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LOOPBACK_MODES_OUT_LEN);
106 size_t outlen;
107 int rc;
108
109 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LOOPBACK_MODES, NULL, 0,
110 outbuf, sizeof(outbuf), &outlen);
111 if (rc)
112 goto fail;
113
114 if (outlen < (MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_OFST +
115 MC_CMD_GET_LOOPBACK_MODES_OUT_SUGGESTED_LEN)) {
116 rc = -EIO;
117 goto fail;
118 }
119
120 *loopback_modes = MCDI_QWORD(outbuf, GET_LOOPBACK_MODES_OUT_SUGGESTED);
121
122 return 0;
123
124 fail:
125 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
126 return rc;
127 }
128
129 static int efx_mcdi_mdio_read(struct net_device *net_dev,
130 int prtad, int devad, u16 addr)
131 {
132 struct efx_nic *efx = netdev_priv(net_dev);
133 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_READ_IN_LEN);
134 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_READ_OUT_LEN);
135 size_t outlen;
136 int rc;
137
138 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_BUS, efx->mdio_bus);
139 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_PRTAD, prtad);
140 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_DEVAD, devad);
141 MCDI_SET_DWORD(inbuf, MDIO_READ_IN_ADDR, addr);
142
143 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_READ, inbuf, sizeof(inbuf),
144 outbuf, sizeof(outbuf), &outlen);
145 if (rc)
146 goto fail;
147
148 if (MCDI_DWORD(outbuf, MDIO_READ_OUT_STATUS) !=
149 MC_CMD_MDIO_STATUS_GOOD)
150 return -EIO;
151
152 return (u16)MCDI_DWORD(outbuf, MDIO_READ_OUT_VALUE);
153
154 fail:
155 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
156 return rc;
157 }
158
159 static int efx_mcdi_mdio_write(struct net_device *net_dev,
160 int prtad, int devad, u16 addr, u16 value)
161 {
162 struct efx_nic *efx = netdev_priv(net_dev);
163 MCDI_DECLARE_BUF(inbuf, MC_CMD_MDIO_WRITE_IN_LEN);
164 MCDI_DECLARE_BUF(outbuf, MC_CMD_MDIO_WRITE_OUT_LEN);
165 size_t outlen;
166 int rc;
167
168 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_BUS, efx->mdio_bus);
169 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_PRTAD, prtad);
170 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_DEVAD, devad);
171 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_ADDR, addr);
172 MCDI_SET_DWORD(inbuf, MDIO_WRITE_IN_VALUE, value);
173
174 rc = efx_mcdi_rpc(efx, MC_CMD_MDIO_WRITE, inbuf, sizeof(inbuf),
175 outbuf, sizeof(outbuf), &outlen);
176 if (rc)
177 goto fail;
178
179 if (MCDI_DWORD(outbuf, MDIO_WRITE_OUT_STATUS) !=
180 MC_CMD_MDIO_STATUS_GOOD)
181 return -EIO;
182
183 return 0;
184
185 fail:
186 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n", __func__, rc);
187 return rc;
188 }
189
190 static u32 mcdi_to_ethtool_cap(u32 media, u32 cap)
191 {
192 u32 result = 0;
193
194 switch (media) {
195 case MC_CMD_MEDIA_KX4:
196 result |= SUPPORTED_Backplane;
197 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
198 result |= SUPPORTED_1000baseKX_Full;
199 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
200 result |= SUPPORTED_10000baseKX4_Full;
201 break;
202
203 case MC_CMD_MEDIA_XFP:
204 case MC_CMD_MEDIA_SFP_PLUS:
205 result |= SUPPORTED_FIBRE;
206 break;
207
208 case MC_CMD_MEDIA_BASE_T:
209 result |= SUPPORTED_TP;
210 if (cap & (1 << MC_CMD_PHY_CAP_10HDX_LBN))
211 result |= SUPPORTED_10baseT_Half;
212 if (cap & (1 << MC_CMD_PHY_CAP_10FDX_LBN))
213 result |= SUPPORTED_10baseT_Full;
214 if (cap & (1 << MC_CMD_PHY_CAP_100HDX_LBN))
215 result |= SUPPORTED_100baseT_Half;
216 if (cap & (1 << MC_CMD_PHY_CAP_100FDX_LBN))
217 result |= SUPPORTED_100baseT_Full;
218 if (cap & (1 << MC_CMD_PHY_CAP_1000HDX_LBN))
219 result |= SUPPORTED_1000baseT_Half;
220 if (cap & (1 << MC_CMD_PHY_CAP_1000FDX_LBN))
221 result |= SUPPORTED_1000baseT_Full;
222 if (cap & (1 << MC_CMD_PHY_CAP_10000FDX_LBN))
223 result |= SUPPORTED_10000baseT_Full;
224 break;
225 }
226
227 if (cap & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
228 result |= SUPPORTED_Pause;
229 if (cap & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
230 result |= SUPPORTED_Asym_Pause;
231 if (cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
232 result |= SUPPORTED_Autoneg;
233
234 return result;
235 }
236
237 static u32 ethtool_to_mcdi_cap(u32 cap)
238 {
239 u32 result = 0;
240
241 if (cap & SUPPORTED_10baseT_Half)
242 result |= (1 << MC_CMD_PHY_CAP_10HDX_LBN);
243 if (cap & SUPPORTED_10baseT_Full)
244 result |= (1 << MC_CMD_PHY_CAP_10FDX_LBN);
245 if (cap & SUPPORTED_100baseT_Half)
246 result |= (1 << MC_CMD_PHY_CAP_100HDX_LBN);
247 if (cap & SUPPORTED_100baseT_Full)
248 result |= (1 << MC_CMD_PHY_CAP_100FDX_LBN);
249 if (cap & SUPPORTED_1000baseT_Half)
250 result |= (1 << MC_CMD_PHY_CAP_1000HDX_LBN);
251 if (cap & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseKX_Full))
252 result |= (1 << MC_CMD_PHY_CAP_1000FDX_LBN);
253 if (cap & (SUPPORTED_10000baseT_Full | SUPPORTED_10000baseKX4_Full))
254 result |= (1 << MC_CMD_PHY_CAP_10000FDX_LBN);
255 if (cap & SUPPORTED_Pause)
256 result |= (1 << MC_CMD_PHY_CAP_PAUSE_LBN);
257 if (cap & SUPPORTED_Asym_Pause)
258 result |= (1 << MC_CMD_PHY_CAP_ASYM_LBN);
259 if (cap & SUPPORTED_Autoneg)
260 result |= (1 << MC_CMD_PHY_CAP_AN_LBN);
261
262 return result;
263 }
264
265 static u32 efx_get_mcdi_phy_flags(struct efx_nic *efx)
266 {
267 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
268 enum efx_phy_mode mode, supported;
269 u32 flags;
270
271 /* TODO: Advertise the capabilities supported by this PHY */
272 supported = 0;
273 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_TXDIS_LBN))
274 supported |= PHY_MODE_TX_DISABLED;
275 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_LOWPOWER_LBN))
276 supported |= PHY_MODE_LOW_POWER;
277 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_POWEROFF_LBN))
278 supported |= PHY_MODE_OFF;
279
280 mode = efx->phy_mode & supported;
281
282 flags = 0;
283 if (mode & PHY_MODE_TX_DISABLED)
284 flags |= (1 << MC_CMD_SET_LINK_IN_TXDIS_LBN);
285 if (mode & PHY_MODE_LOW_POWER)
286 flags |= (1 << MC_CMD_SET_LINK_IN_LOWPOWER_LBN);
287 if (mode & PHY_MODE_OFF)
288 flags |= (1 << MC_CMD_SET_LINK_IN_POWEROFF_LBN);
289
290 return flags;
291 }
292
293 static u32 mcdi_to_ethtool_media(u32 media)
294 {
295 switch (media) {
296 case MC_CMD_MEDIA_XAUI:
297 case MC_CMD_MEDIA_CX4:
298 case MC_CMD_MEDIA_KX4:
299 return PORT_OTHER;
300
301 case MC_CMD_MEDIA_XFP:
302 case MC_CMD_MEDIA_SFP_PLUS:
303 return PORT_FIBRE;
304
305 case MC_CMD_MEDIA_BASE_T:
306 return PORT_TP;
307
308 default:
309 return PORT_OTHER;
310 }
311 }
312
313 static void efx_mcdi_phy_decode_link(struct efx_nic *efx,
314 struct efx_link_state *link_state,
315 u32 speed, u32 flags, u32 fcntl)
316 {
317 switch (fcntl) {
318 case MC_CMD_FCNTL_AUTO:
319 WARN_ON(1); /* This is not a link mode */
320 link_state->fc = EFX_FC_AUTO | EFX_FC_TX | EFX_FC_RX;
321 break;
322 case MC_CMD_FCNTL_BIDIR:
323 link_state->fc = EFX_FC_TX | EFX_FC_RX;
324 break;
325 case MC_CMD_FCNTL_RESPOND:
326 link_state->fc = EFX_FC_RX;
327 break;
328 default:
329 WARN_ON(1);
330 case MC_CMD_FCNTL_OFF:
331 link_state->fc = 0;
332 break;
333 }
334
335 link_state->up = !!(flags & (1 << MC_CMD_GET_LINK_OUT_LINK_UP_LBN));
336 link_state->fd = !!(flags & (1 << MC_CMD_GET_LINK_OUT_FULL_DUPLEX_LBN));
337 link_state->speed = speed;
338 }
339
340 static int efx_mcdi_phy_probe(struct efx_nic *efx)
341 {
342 struct efx_mcdi_phy_data *phy_data;
343 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
344 u32 caps;
345 int rc;
346
347 /* Initialise and populate phy_data */
348 phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
349 if (phy_data == NULL)
350 return -ENOMEM;
351
352 rc = efx_mcdi_get_phy_cfg(efx, phy_data);
353 if (rc != 0)
354 goto fail;
355
356 /* Read initial link advertisement */
357 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
358 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
359 outbuf, sizeof(outbuf), NULL);
360 if (rc)
361 goto fail;
362
363 /* Fill out nic state */
364 efx->phy_data = phy_data;
365 efx->phy_type = phy_data->type;
366
367 efx->mdio_bus = phy_data->channel;
368 efx->mdio.prtad = phy_data->port;
369 efx->mdio.mmds = phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22);
370 efx->mdio.mode_support = 0;
371 if (phy_data->mmd_mask & (1 << MC_CMD_MMD_CLAUSE22))
372 efx->mdio.mode_support |= MDIO_SUPPORTS_C22;
373 if (phy_data->mmd_mask & ~(1 << MC_CMD_MMD_CLAUSE22))
374 efx->mdio.mode_support |= MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
375
376 caps = MCDI_DWORD(outbuf, GET_LINK_OUT_CAP);
377 if (caps & (1 << MC_CMD_PHY_CAP_AN_LBN))
378 efx->link_advertising =
379 mcdi_to_ethtool_cap(phy_data->media, caps);
380 else
381 phy_data->forced_cap = caps;
382
383 /* Assert that we can map efx -> mcdi loopback modes */
384 BUILD_BUG_ON(LOOPBACK_NONE != MC_CMD_LOOPBACK_NONE);
385 BUILD_BUG_ON(LOOPBACK_DATA != MC_CMD_LOOPBACK_DATA);
386 BUILD_BUG_ON(LOOPBACK_GMAC != MC_CMD_LOOPBACK_GMAC);
387 BUILD_BUG_ON(LOOPBACK_XGMII != MC_CMD_LOOPBACK_XGMII);
388 BUILD_BUG_ON(LOOPBACK_XGXS != MC_CMD_LOOPBACK_XGXS);
389 BUILD_BUG_ON(LOOPBACK_XAUI != MC_CMD_LOOPBACK_XAUI);
390 BUILD_BUG_ON(LOOPBACK_GMII != MC_CMD_LOOPBACK_GMII);
391 BUILD_BUG_ON(LOOPBACK_SGMII != MC_CMD_LOOPBACK_SGMII);
392 BUILD_BUG_ON(LOOPBACK_XGBR != MC_CMD_LOOPBACK_XGBR);
393 BUILD_BUG_ON(LOOPBACK_XFI != MC_CMD_LOOPBACK_XFI);
394 BUILD_BUG_ON(LOOPBACK_XAUI_FAR != MC_CMD_LOOPBACK_XAUI_FAR);
395 BUILD_BUG_ON(LOOPBACK_GMII_FAR != MC_CMD_LOOPBACK_GMII_FAR);
396 BUILD_BUG_ON(LOOPBACK_SGMII_FAR != MC_CMD_LOOPBACK_SGMII_FAR);
397 BUILD_BUG_ON(LOOPBACK_XFI_FAR != MC_CMD_LOOPBACK_XFI_FAR);
398 BUILD_BUG_ON(LOOPBACK_GPHY != MC_CMD_LOOPBACK_GPHY);
399 BUILD_BUG_ON(LOOPBACK_PHYXS != MC_CMD_LOOPBACK_PHYXS);
400 BUILD_BUG_ON(LOOPBACK_PCS != MC_CMD_LOOPBACK_PCS);
401 BUILD_BUG_ON(LOOPBACK_PMAPMD != MC_CMD_LOOPBACK_PMAPMD);
402 BUILD_BUG_ON(LOOPBACK_XPORT != MC_CMD_LOOPBACK_XPORT);
403 BUILD_BUG_ON(LOOPBACK_XGMII_WS != MC_CMD_LOOPBACK_XGMII_WS);
404 BUILD_BUG_ON(LOOPBACK_XAUI_WS != MC_CMD_LOOPBACK_XAUI_WS);
405 BUILD_BUG_ON(LOOPBACK_XAUI_WS_FAR != MC_CMD_LOOPBACK_XAUI_WS_FAR);
406 BUILD_BUG_ON(LOOPBACK_XAUI_WS_NEAR != MC_CMD_LOOPBACK_XAUI_WS_NEAR);
407 BUILD_BUG_ON(LOOPBACK_GMII_WS != MC_CMD_LOOPBACK_GMII_WS);
408 BUILD_BUG_ON(LOOPBACK_XFI_WS != MC_CMD_LOOPBACK_XFI_WS);
409 BUILD_BUG_ON(LOOPBACK_XFI_WS_FAR != MC_CMD_LOOPBACK_XFI_WS_FAR);
410 BUILD_BUG_ON(LOOPBACK_PHYXS_WS != MC_CMD_LOOPBACK_PHYXS_WS);
411
412 rc = efx_mcdi_loopback_modes(efx, &efx->loopback_modes);
413 if (rc != 0)
414 goto fail;
415 /* The MC indicates that LOOPBACK_NONE is a valid loopback mode,
416 * but by convention we don't */
417 efx->loopback_modes &= ~(1 << LOOPBACK_NONE);
418
419 /* Set the initial link mode */
420 efx_mcdi_phy_decode_link(
421 efx, &efx->link_state,
422 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
423 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
424 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
425
426 /* Default to Autonegotiated flow control if the PHY supports it */
427 efx->wanted_fc = EFX_FC_RX | EFX_FC_TX;
428 if (phy_data->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
429 efx->wanted_fc |= EFX_FC_AUTO;
430 efx_link_set_wanted_fc(efx, efx->wanted_fc);
431
432 return 0;
433
434 fail:
435 kfree(phy_data);
436 return rc;
437 }
438
439 int efx_mcdi_port_reconfigure(struct efx_nic *efx)
440 {
441 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
442 u32 caps = (efx->link_advertising ?
443 ethtool_to_mcdi_cap(efx->link_advertising) :
444 phy_cfg->forced_cap);
445
446 return efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
447 efx->loopback_mode, 0);
448 }
449
450 /* Verify that the forced flow control settings (!EFX_FC_AUTO) are
451 * supported by the link partner. Warn the user if this isn't the case
452 */
453 static void efx_mcdi_phy_check_fcntl(struct efx_nic *efx, u32 lpa)
454 {
455 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
456 u32 rmtadv;
457
458 /* The link partner capabilities are only relevant if the
459 * link supports flow control autonegotiation */
460 if (~phy_cfg->supported_cap & (1 << MC_CMD_PHY_CAP_AN_LBN))
461 return;
462
463 /* If flow control autoneg is supported and enabled, then fine */
464 if (efx->wanted_fc & EFX_FC_AUTO)
465 return;
466
467 rmtadv = 0;
468 if (lpa & (1 << MC_CMD_PHY_CAP_PAUSE_LBN))
469 rmtadv |= ADVERTISED_Pause;
470 if (lpa & (1 << MC_CMD_PHY_CAP_ASYM_LBN))
471 rmtadv |= ADVERTISED_Asym_Pause;
472
473 if ((efx->wanted_fc & EFX_FC_TX) && rmtadv == ADVERTISED_Asym_Pause)
474 netif_err(efx, link, efx->net_dev,
475 "warning: link partner doesn't support pause frames");
476 }
477
478 static bool efx_mcdi_phy_poll(struct efx_nic *efx)
479 {
480 struct efx_link_state old_state = efx->link_state;
481 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
482 int rc;
483
484 WARN_ON(!mutex_is_locked(&efx->mac_lock));
485
486 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
487
488 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
489 outbuf, sizeof(outbuf), NULL);
490 if (rc) {
491 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
492 __func__, rc);
493 efx->link_state.up = false;
494 } else {
495 efx_mcdi_phy_decode_link(
496 efx, &efx->link_state,
497 MCDI_DWORD(outbuf, GET_LINK_OUT_LINK_SPEED),
498 MCDI_DWORD(outbuf, GET_LINK_OUT_FLAGS),
499 MCDI_DWORD(outbuf, GET_LINK_OUT_FCNTL));
500 }
501
502 return !efx_link_state_equal(&efx->link_state, &old_state);
503 }
504
505 static void efx_mcdi_phy_remove(struct efx_nic *efx)
506 {
507 struct efx_mcdi_phy_data *phy_data = efx->phy_data;
508
509 efx->phy_data = NULL;
510 kfree(phy_data);
511 }
512
513 static void efx_mcdi_phy_get_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
514 {
515 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
516 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
517 int rc;
518
519 ecmd->supported =
520 mcdi_to_ethtool_cap(phy_cfg->media, phy_cfg->supported_cap);
521 ecmd->advertising = efx->link_advertising;
522 ethtool_cmd_speed_set(ecmd, efx->link_state.speed);
523 ecmd->duplex = efx->link_state.fd;
524 ecmd->port = mcdi_to_ethtool_media(phy_cfg->media);
525 ecmd->phy_address = phy_cfg->port;
526 ecmd->transceiver = XCVR_INTERNAL;
527 ecmd->autoneg = !!(efx->link_advertising & ADVERTISED_Autoneg);
528 ecmd->mdio_support = (efx->mdio.mode_support &
529 (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22));
530
531 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
532 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
533 outbuf, sizeof(outbuf), NULL);
534 if (rc) {
535 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
536 __func__, rc);
537 return;
538 }
539 ecmd->lp_advertising =
540 mcdi_to_ethtool_cap(phy_cfg->media,
541 MCDI_DWORD(outbuf, GET_LINK_OUT_LP_CAP));
542 }
543
544 static int efx_mcdi_phy_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
545 {
546 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
547 u32 caps;
548 int rc;
549
550 if (ecmd->autoneg) {
551 caps = (ethtool_to_mcdi_cap(ecmd->advertising) |
552 1 << MC_CMD_PHY_CAP_AN_LBN);
553 } else if (ecmd->duplex) {
554 switch (ethtool_cmd_speed(ecmd)) {
555 case 10: caps = 1 << MC_CMD_PHY_CAP_10FDX_LBN; break;
556 case 100: caps = 1 << MC_CMD_PHY_CAP_100FDX_LBN; break;
557 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000FDX_LBN; break;
558 case 10000: caps = 1 << MC_CMD_PHY_CAP_10000FDX_LBN; break;
559 default: return -EINVAL;
560 }
561 } else {
562 switch (ethtool_cmd_speed(ecmd)) {
563 case 10: caps = 1 << MC_CMD_PHY_CAP_10HDX_LBN; break;
564 case 100: caps = 1 << MC_CMD_PHY_CAP_100HDX_LBN; break;
565 case 1000: caps = 1 << MC_CMD_PHY_CAP_1000HDX_LBN; break;
566 default: return -EINVAL;
567 }
568 }
569
570 rc = efx_mcdi_set_link(efx, caps, efx_get_mcdi_phy_flags(efx),
571 efx->loopback_mode, 0);
572 if (rc)
573 return rc;
574
575 if (ecmd->autoneg) {
576 efx_link_set_advertising(
577 efx, ecmd->advertising | ADVERTISED_Autoneg);
578 phy_cfg->forced_cap = 0;
579 } else {
580 efx_link_set_advertising(efx, 0);
581 phy_cfg->forced_cap = caps;
582 }
583 return 0;
584 }
585
586 static int efx_mcdi_phy_test_alive(struct efx_nic *efx)
587 {
588 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_STATE_OUT_LEN);
589 size_t outlen;
590 int rc;
591
592 BUILD_BUG_ON(MC_CMD_GET_PHY_STATE_IN_LEN != 0);
593
594 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_STATE, NULL, 0,
595 outbuf, sizeof(outbuf), &outlen);
596 if (rc)
597 return rc;
598
599 if (outlen < MC_CMD_GET_PHY_STATE_OUT_LEN)
600 return -EIO;
601 if (MCDI_DWORD(outbuf, GET_PHY_STATE_OUT_STATE) != MC_CMD_PHY_STATE_OK)
602 return -EINVAL;
603
604 return 0;
605 }
606
607 static const char *const mcdi_sft9001_cable_diag_names[] = {
608 "cable.pairA.length",
609 "cable.pairB.length",
610 "cable.pairC.length",
611 "cable.pairD.length",
612 "cable.pairA.status",
613 "cable.pairB.status",
614 "cable.pairC.status",
615 "cable.pairD.status",
616 };
617
618 static int efx_mcdi_bist(struct efx_nic *efx, unsigned int bist_mode,
619 int *results)
620 {
621 unsigned int retry, i, count = 0;
622 size_t outlen;
623 u32 status;
624 MCDI_DECLARE_BUF(inbuf, MC_CMD_START_BIST_IN_LEN);
625 MCDI_DECLARE_BUF(outbuf, MC_CMD_POLL_BIST_OUT_SFT9001_LEN);
626 u8 *ptr;
627 int rc;
628
629 BUILD_BUG_ON(MC_CMD_START_BIST_OUT_LEN != 0);
630 MCDI_SET_DWORD(inbuf, START_BIST_IN_TYPE, bist_mode);
631 rc = efx_mcdi_rpc(efx, MC_CMD_START_BIST,
632 inbuf, MC_CMD_START_BIST_IN_LEN, NULL, 0, NULL);
633 if (rc)
634 goto out;
635
636 /* Wait up to 10s for BIST to finish */
637 for (retry = 0; retry < 100; ++retry) {
638 BUILD_BUG_ON(MC_CMD_POLL_BIST_IN_LEN != 0);
639 rc = efx_mcdi_rpc(efx, MC_CMD_POLL_BIST, NULL, 0,
640 outbuf, sizeof(outbuf), &outlen);
641 if (rc)
642 goto out;
643
644 status = MCDI_DWORD(outbuf, POLL_BIST_OUT_RESULT);
645 if (status != MC_CMD_POLL_BIST_RUNNING)
646 goto finished;
647
648 msleep(100);
649 }
650
651 rc = -ETIMEDOUT;
652 goto out;
653
654 finished:
655 results[count++] = (status == MC_CMD_POLL_BIST_PASSED) ? 1 : -1;
656
657 /* SFT9001 specific cable diagnostics output */
658 if (efx->phy_type == PHY_TYPE_SFT9001B &&
659 (bist_mode == MC_CMD_PHY_BIST_CABLE_SHORT ||
660 bist_mode == MC_CMD_PHY_BIST_CABLE_LONG)) {
661 ptr = MCDI_PTR(outbuf, POLL_BIST_OUT_SFT9001_CABLE_LENGTH_A);
662 if (status == MC_CMD_POLL_BIST_PASSED &&
663 outlen >= MC_CMD_POLL_BIST_OUT_SFT9001_LEN) {
664 for (i = 0; i < 8; i++) {
665 results[count + i] =
666 EFX_DWORD_FIELD(((efx_dword_t *)ptr)[i],
667 EFX_DWORD_0);
668 }
669 }
670 count += 8;
671 }
672 rc = count;
673
674 out:
675 return rc;
676 }
677
678 static int efx_mcdi_phy_run_tests(struct efx_nic *efx, int *results,
679 unsigned flags)
680 {
681 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
682 u32 mode;
683 int rc;
684
685 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
686 rc = efx_mcdi_bist(efx, MC_CMD_PHY_BIST, results);
687 if (rc < 0)
688 return rc;
689
690 results += rc;
691 }
692
693 /* If we support both LONG and SHORT, then run each in response to
694 * break or not. Otherwise, run the one we support */
695 mode = 0;
696 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN)) {
697 if ((flags & ETH_TEST_FL_OFFLINE) &&
698 (phy_cfg->flags &
699 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN)))
700 mode = MC_CMD_PHY_BIST_CABLE_LONG;
701 else
702 mode = MC_CMD_PHY_BIST_CABLE_SHORT;
703 } else if (phy_cfg->flags &
704 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))
705 mode = MC_CMD_PHY_BIST_CABLE_LONG;
706
707 if (mode != 0) {
708 rc = efx_mcdi_bist(efx, mode, results);
709 if (rc < 0)
710 return rc;
711 results += rc;
712 }
713
714 return 0;
715 }
716
717 static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
718 unsigned int index)
719 {
720 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
721
722 if (phy_cfg->flags & (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_LBN)) {
723 if (index == 0)
724 return "bist";
725 --index;
726 }
727
728 if (phy_cfg->flags & ((1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_SHORT_LBN) |
729 (1 << MC_CMD_GET_PHY_CFG_OUT_BIST_CABLE_LONG_LBN))) {
730 if (index == 0)
731 return "cable";
732 --index;
733
734 if (efx->phy_type == PHY_TYPE_SFT9001B) {
735 if (index < ARRAY_SIZE(mcdi_sft9001_cable_diag_names))
736 return mcdi_sft9001_cable_diag_names[index];
737 index -= ARRAY_SIZE(mcdi_sft9001_cable_diag_names);
738 }
739 }
740
741 return NULL;
742 }
743
744 #define SFP_PAGE_SIZE 128
745 #define SFP_NUM_PAGES 2
746 static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
747 struct ethtool_eeprom *ee, u8 *data)
748 {
749 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
750 MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
751 size_t outlen;
752 int rc;
753 unsigned int payload_len;
754 unsigned int space_remaining = ee->len;
755 unsigned int page;
756 unsigned int page_off;
757 unsigned int to_copy;
758 u8 *user_data = data;
759
760 BUILD_BUG_ON(SFP_PAGE_SIZE * SFP_NUM_PAGES != ETH_MODULE_SFF_8079_LEN);
761
762 page_off = ee->offset % SFP_PAGE_SIZE;
763 page = ee->offset / SFP_PAGE_SIZE;
764
765 while (space_remaining && (page < SFP_NUM_PAGES)) {
766 MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
767
768 rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_MEDIA_INFO,
769 inbuf, sizeof(inbuf),
770 outbuf, sizeof(outbuf),
771 &outlen);
772 if (rc)
773 return rc;
774
775 if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
776 SFP_PAGE_SIZE))
777 return -EIO;
778
779 payload_len = MCDI_DWORD(outbuf,
780 GET_PHY_MEDIA_INFO_OUT_DATALEN);
781 if (payload_len != SFP_PAGE_SIZE)
782 return -EIO;
783
784 /* Copy as much as we can into data */
785 payload_len -= page_off;
786 to_copy = (space_remaining < payload_len) ?
787 space_remaining : payload_len;
788
789 memcpy(user_data,
790 MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + page_off,
791 to_copy);
792
793 space_remaining -= to_copy;
794 user_data += to_copy;
795 page_off = 0;
796 page++;
797 }
798
799 return 0;
800 }
801
802 static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
803 struct ethtool_modinfo *modinfo)
804 {
805 struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
806
807 switch (phy_cfg->media) {
808 case MC_CMD_MEDIA_SFP_PLUS:
809 modinfo->type = ETH_MODULE_SFF_8079;
810 modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
811 return 0;
812 default:
813 return -EOPNOTSUPP;
814 }
815 }
816
817 static const struct efx_phy_operations efx_mcdi_phy_ops = {
818 .probe = efx_mcdi_phy_probe,
819 .init = efx_port_dummy_op_int,
820 .reconfigure = efx_mcdi_port_reconfigure,
821 .poll = efx_mcdi_phy_poll,
822 .fini = efx_port_dummy_op_void,
823 .remove = efx_mcdi_phy_remove,
824 .get_settings = efx_mcdi_phy_get_settings,
825 .set_settings = efx_mcdi_phy_set_settings,
826 .test_alive = efx_mcdi_phy_test_alive,
827 .run_tests = efx_mcdi_phy_run_tests,
828 .test_name = efx_mcdi_phy_test_name,
829 .get_module_eeprom = efx_mcdi_phy_get_module_eeprom,
830 .get_module_info = efx_mcdi_phy_get_module_info,
831 };
832
833 static unsigned int efx_mcdi_event_link_speed[] = {
834 [MCDI_EVENT_LINKCHANGE_SPEED_100M] = 100,
835 [MCDI_EVENT_LINKCHANGE_SPEED_1G] = 1000,
836 [MCDI_EVENT_LINKCHANGE_SPEED_10G] = 10000,
837 };
838
839 void efx_mcdi_process_link_change(struct efx_nic *efx, efx_qword_t *ev)
840 {
841 u32 flags, fcntl, speed, lpa;
842
843 speed = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_SPEED);
844 EFX_BUG_ON_PARANOID(speed >= ARRAY_SIZE(efx_mcdi_event_link_speed));
845 speed = efx_mcdi_event_link_speed[speed];
846
847 flags = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LINK_FLAGS);
848 fcntl = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_FCNTL);
849 lpa = EFX_QWORD_FIELD(*ev, MCDI_EVENT_LINKCHANGE_LP_CAP);
850
851 /* efx->link_state is only modified by efx_mcdi_phy_get_link(),
852 * which is only run after flushing the event queues. Therefore, it
853 * is safe to modify the link state outside of the mac_lock here.
854 */
855 efx_mcdi_phy_decode_link(efx, &efx->link_state, speed, flags, fcntl);
856
857 efx_mcdi_phy_check_fcntl(efx, lpa);
858
859 efx_link_status_changed(efx);
860 }
861
862 int efx_mcdi_set_mac(struct efx_nic *efx)
863 {
864 u32 fcntl;
865 MCDI_DECLARE_BUF(cmdbytes, MC_CMD_SET_MAC_IN_LEN);
866
867 BUILD_BUG_ON(MC_CMD_SET_MAC_OUT_LEN != 0);
868
869 memcpy(MCDI_PTR(cmdbytes, SET_MAC_IN_ADDR),
870 efx->net_dev->dev_addr, ETH_ALEN);
871
872 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_MTU,
873 EFX_MAX_FRAME_LEN(efx->net_dev->mtu));
874 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_DRAIN, 0);
875
876 /* Set simple MAC filter for Siena */
877 MCDI_POPULATE_DWORD_1(cmdbytes, SET_MAC_IN_REJECT,
878 SET_MAC_IN_REJECT_UNCST, efx->unicast_filter);
879
880 switch (efx->wanted_fc) {
881 case EFX_FC_RX | EFX_FC_TX:
882 fcntl = MC_CMD_FCNTL_BIDIR;
883 break;
884 case EFX_FC_RX:
885 fcntl = MC_CMD_FCNTL_RESPOND;
886 break;
887 default:
888 fcntl = MC_CMD_FCNTL_OFF;
889 break;
890 }
891 if (efx->wanted_fc & EFX_FC_AUTO)
892 fcntl = MC_CMD_FCNTL_AUTO;
893 if (efx->fc_disable)
894 fcntl = MC_CMD_FCNTL_OFF;
895
896 MCDI_SET_DWORD(cmdbytes, SET_MAC_IN_FCNTL, fcntl);
897
898 return efx_mcdi_rpc(efx, MC_CMD_SET_MAC, cmdbytes, sizeof(cmdbytes),
899 NULL, 0, NULL);
900 }
901
902 bool efx_mcdi_mac_check_fault(struct efx_nic *efx)
903 {
904 MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_LINK_OUT_LEN);
905 size_t outlength;
906 int rc;
907
908 BUILD_BUG_ON(MC_CMD_GET_LINK_IN_LEN != 0);
909
910 rc = efx_mcdi_rpc(efx, MC_CMD_GET_LINK, NULL, 0,
911 outbuf, sizeof(outbuf), &outlength);
912 if (rc) {
913 netif_err(efx, hw, efx->net_dev, "%s: failed rc=%d\n",
914 __func__, rc);
915 return true;
916 }
917
918 return MCDI_DWORD(outbuf, GET_LINK_OUT_MAC_FAULT) != 0;
919 }
920
921 static int efx_mcdi_mac_stats(struct efx_nic *efx, dma_addr_t dma_addr,
922 u32 dma_len, int enable, int clear)
923 {
924 MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
925 int rc;
926 int period = enable ? 1000 : 0;
927
928 BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0);
929
930 MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr);
931 MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD,
932 MAC_STATS_IN_DMA, !!enable,
933 MAC_STATS_IN_CLEAR, clear,
934 MAC_STATS_IN_PERIODIC_CHANGE, 1,
935 MAC_STATS_IN_PERIODIC_ENABLE, !!enable,
936 MAC_STATS_IN_PERIODIC_CLEAR, 0,
937 MAC_STATS_IN_PERIODIC_NOEVENT, 1,
938 MAC_STATS_IN_PERIOD_MS, period);
939 MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len);
940
941 rc = efx_mcdi_rpc(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf),
942 NULL, 0, NULL);
943 if (rc)
944 goto fail;
945
946 return 0;
947
948 fail:
949 netif_err(efx, hw, efx->net_dev, "%s: %s failed rc=%d\n",
950 __func__, enable ? "enable" : "disable", rc);
951 return rc;
952 }
953
954 void efx_mcdi_mac_start_stats(struct efx_nic *efx)
955 {
956 __le64 *dma_stats = efx->stats_buffer.addr;
957
958 dma_stats[MC_CMD_MAC_GENERATION_END] = EFX_MC_STATS_GENERATION_INVALID;
959
960 efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr,
961 MC_CMD_MAC_NSTATS * sizeof(u64), 1, 0);
962 }
963
964 void efx_mcdi_mac_stop_stats(struct efx_nic *efx)
965 {
966 efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr, 0, 0, 0);
967 }
968
969 int efx_mcdi_port_probe(struct efx_nic *efx)
970 {
971 int rc;
972
973 /* Hook in PHY operations table */
974 efx->phy_op = &efx_mcdi_phy_ops;
975
976 /* Set up MDIO structure for PHY */
977 efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
978 efx->mdio.mdio_read = efx_mcdi_mdio_read;
979 efx->mdio.mdio_write = efx_mcdi_mdio_write;
980
981 /* Fill out MDIO structure, loopback modes, and initial link state */
982 rc = efx->phy_op->probe(efx);
983 if (rc != 0)
984 return rc;
985
986 /* Allocate buffer for stats */
987 rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
988 MC_CMD_MAC_NSTATS * sizeof(u64), GFP_KERNEL);
989 if (rc)
990 return rc;
991 netif_dbg(efx, probe, efx->net_dev,
992 "stats buffer at %llx (virt %p phys %llx)\n",
993 (u64)efx->stats_buffer.dma_addr,
994 efx->stats_buffer.addr,
995 (u64)virt_to_phys(efx->stats_buffer.addr));
996
997 efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr, 0, 0, 1);
998
999 return 0;
1000 }
1001
1002 void efx_mcdi_port_remove(struct efx_nic *efx)
1003 {
1004 efx->phy_op->remove(efx);
1005 efx_nic_free_buffer(efx, &efx->stats_buffer);
1006 }
Linux kernel - Deliverables
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